Mill drive



May 9, 1933.

R. C. F. KURTZE MILL 1mm:

Filed Jan. 4. 1930 2 Sheets-Shet l INVENTOR.

' ATTokNEY.

" i/W cmzrtze,

' May 9, 1933. R. c. F. KURTZE MILL DRIVE 2 Sheets-Sheet 2 Filed Jan. 4, 1930 n X a z 0% W \1/ 3 Z I 5 fim/ m W 7 7 .4; 5

Patented May 9, 1933 UNITED STATES REHAB O. I. KUBTZE, OI YOUNGSTOWN, OHIO KILL DRIVE Application Med January 4, 1980. Serial No. 418,522.

chanically correct contact of the moving parts in all positions.

A further object is to provide an appllance which permits the ready withdrawal of the torque member without disturbing the ad-' jacent machinery.

It is a well known fact that up to the present time the steel rolling mills and similar industries employ as a universal drive a very crude apparatus which, however, has proven to be able to withstand the enormous shocks imparted to it in its functions.

25 These shocks are improperly absorbed and are transferred to the bearings and frame work of the machinery.

The invention disclosed will absorb these shocks without transferring them to other parts due to the correct mechanical contact being provided for all the varying positions of the torque member with the driving and driven shaft bodies. may be given any desirable dimensions in relation to the work.

With the foregoing and other objects in View which will appear as the description proceeds, the invention resides in the combination and arrangement of parts and in the details of construction hereinafter described and claimed, it being understood that chan es in the precise embodiment of the invention herein disclosed, can be made within the scope of what is claimed, without departing from the spirit of the invention.

The invention is illustrated in the accompanying drawings wherein I Figure 1 is a front view of one section with one section of shaft end fittings with the torque member removed.

To these contact areas Figure 2 is a cross section taken on the line 2-2 of Fig. 1 and with the torque member in position.

Figure 3 shows a complete assembly of mill drive partly in cross section to show structure.

Figure 4 shows a modification of the mill drive where connected parts are in close proximity.

Figure 5 is a cross section taken on line 5--5 of Fig. 4.

Figu're 6 is a partial front View of Fig. 4 with shaft removed.

Referring to the first form of the invention shown in Figs. 1, 2 and 3 it will be seen that the device comprises a pair of body portions 1 which are preferably formed of stand- I ard stock or forgings. These body portions are provided with a central bore 2 and are keyed to shafts 3 by means of keys 4. Fur- 7 ther it will be noted that each of the body portions 1 is provided with a shoulder 5, marking a point on the body portions 1 forming an enlarged inner end 6. This enlarged inner end 6 is provided with an enlarged central bore 7 Each of the enlarged inner ends is provided with oppositely disposed grooves 8. Each 'of these enlarged inner ends 6 is provided with a sleeve 9. On the interior of each of these sleeves 9 there is provided oppositely disposed slide planes 10 functioning within the oppositely disposed grooves 8. The body portions 1 are drilled to provide diametrically extending holes or sockets 11 at right angles to the axis of the 35 body portions 1. After this drilling operation, the body portions 1 are lined up and clamped in place and a cutter is run transversely of the enlarged inner ends 6 of the body ortions 1 to form slots 12 and thus open t e holes or sockets 11 to the outer face of the enlarged inner ends 6 of the body portions 1.

Within each of the holes or sockets 11 a rocking member 13 is positioned. This member consists of a piece of accurately cold rolled machined cy indrical stock which has been milled out to provide a rectangular opening 14.

By referring to the drawings it will be no seen that the sleeve 9 is slidable and is shown in Fig. 3 in a back position, in order to allow a quick removal of the torque member 15. 'This sleeve 9 is held in an operating position by means of the set screws 17, the inner ends of which function within .a groove 18 and are firmly set within recesses 19. It will also be seen that when the sleeve 9 is in back position the set screws 17 are at ends 20 of the groove 18. It is obvious that when the set screws 17 are turned out just suflicient to allow the sleeve 9 to be slid back into a back position the sleeve 9 cannot be removed. It is obvious that when the set screws 17 are turned out beyond the groove 18 the sleeve 9 maybe removed, or in assembling that would be the manner in which the sleeve would be put on.

In the form shown in Figs. 4, 5 and 6, it will be seen that the device is modified in order to show the torque member shortened so that the mill drive may be coupled up close to the part to be driven. In order to do this each shaft 3 is similarly equipped as described in Figs. 1, 2 and 3 with the exception that a shortened torque member 21 is provided which functions with the rectangular opening 14 of the rocking members 13. In this modification where the transmission of large amounts of energy is to be made, the sleeves '9 are provided with a flange 23 and 24 respectively and their relative motions are loosely connected by a coverin ring 26. This ring 26 provides with its ange 23 a groove in which the flange 22 may move in all directions, though this motion may be relatively small. At 25 is shown in cross section a heavy felt ring which is somewhat elastic and keeps the sleeves in contact so as to avoid any noise due to looseness of parts. 7

From the foregoing it is clearly seen that each body with its sleeve in working position forms one undivided entity. In each of the two bodies needed, in order to form one operating mill drive unit, provision is made for the connection of a torque member having a .-rectangular cross section. This portion forms the ends of the torque member,

- having any desirable cross section. The rectangular portions are shaped so that at their longitudinal ends they form part of a disc, as shown by the arrows on Fig.2, and in their lateral sides forming part of another disc, as shown by arrow 28.

These disc forms enable the torque member connectionto keep the same contact with the respective limiting areas in the varying positions.

The sleeves 9 are not only retaining means for the cylindrical members and the engaging torque member but mainly and very importantly provide a proper bearing for the cylindrical member to rock on, but also as bearing for the disc shaped torque member end 27. This avoids any undue wear and looseness causing noise in operations and absorbs any sudden shocks due to sudden changes in the direction of running.

- What I claim isr 1." A universal coupling comprising a driving member and'a driven member each provided at its free .end with an open sided cylindrical socket disposed at right angles .to the axis of'rotation a longitudinally slotted cylindrical rocking bolster j ournalled in said socket, a power transmitting torque element having flat ends with parallel plane faces extending through'the' open sides of the cylindrical sockets and into the slots in the bolsters, a retaining sleeve surrounding each of said members and overlying the ends of the bolster disposed therein, said sleeve being retractable to permit removal of the torque element from said bolster, and means for limiting said retraction in order to retain said sleeve over a portion of each end of the bolster which is thereby prevented from sliding out of its socket.

2. A universal coupling comprising a driving member and a driven member each provided at its free end with an open sided cylin drical socket disposed at ri ht angles to the axis of rotation, a longitudinally slotted cylindrical rocking bolster journalled in said socket, a power transmitting torque element having flat ends with parallel plane faces extending through the open sides of the cylindircal sockets and into the slots in the bolsters,

posed parallel bearing faces on itsinner surface and dis osedto surround each of said members witli said bearing faces in engagement with the ends of the bolster disposed therein,'said sleeve being retractable to permit removal of the torque element from said bolster, and means for limiting said retraction in order to retain said sleeve in engagement with a portion of each end of the bolster which is thereby prevented from sliding out of its socket.

3. A universal coupling comprising a driving member and a driven member each provided at its free end with an open sided cylindrical socket disposed at right angles to the axis of rotation, a longitudinally slotted cylindrical rocking bolster journalled in said socket, a power transmitting torque element a retaining sleeve having diametrically'op 9 having flat ends with parallel plane faces exsaid bolster, and means for limiting said retraction in order to retain said sleeve in engagement with a vportion of each end of the bolster which is thereby prevented from sliding out of its socket, said means also being adapted to lock said sleeve in its normal advanced position.

4. A universal coupling comprising a driving member and a driven member each provided at its free end with an open sided cylindrical socket disposed at right angles to the axis of rotation, a longitudinally slotted cylindrical rocking bolster journalled in'said socket, a power transmitting torque element having fiat ends with parallel plane faces extending through the open sides of the cylindrical sockets and into the slots in the bolsters, a retaining sleeve having diametrically opposed parallel bearing faces on its in? ner surface and disposed to surround each of said members with said bearing faces in engagement with the ends of the bolster disposed therein, each member being provided with a longitudinally extending groove in its surface with a depression at its forward end, and a set screw registering with said groove and projecting through said sleeve opposite said depression into which it is adapted to be turned to lock the sleeve in its normal advanced position, the length of the groove being such that the sleeve is retractable sufliciently to premit removal of the torque element while retaining the adjoining bolster in position.

5. A universal coupling comprising a driving member and a driven member each provided at its free end with an open sided cylindrical socket disposed at right angles to the axis of rotation, a cylindrical rocking bolster journalled in said socket and having a longitudinal slot corresponding with the open side thereof, an annular retaining sleeve encircling each of said members and having diametrically opposed parallel plane surfaces in engagement with the ends of the bolster disposed therein for retaining it in position, a torque element havin flat ends with parallel plane faces snugly isposed in the slots in the bolsters for transmitting power from the driving to the driven member, said sleeve being retractable to permit the removal of the torque element from said bolster, and removable means for limiting said retraction in order to retain said sleeve in enga ement with a portion of each end of the olster which is thereby prevented from sliding out of its socket.

In testimony whereof I aflix my signature.

REIMAR C. F. KURTZE. 

